class sheet{

    // constructor(tableName,charset,columns,tableComment){
    //     this.tableName = tableName,
    //     this.tableComment = tableComment,
    //     this.charset = charset,
    //     this.columns = columns
    // }

    constructor(tableName,charset,tableComment){
        this.tableName = tableName,
        this.tableComment = tableComment,
        this.charset = charset
    }

    setColumns(columns){
        this.columns = columns;
    }
}

class column{
    constructor(name,type,len,decimal,isN,isKey,comment,defaultV){
        this.name = name,
        this.type = type,
        this.len = len,
        this.decimal = decimal,
        this.isN = isN,
        this.isKey = isKey,
        this.comment = comment,
        this.defaultV = defaultV
    }
}

module.exports.sheet = sheet;
module.exports.column = column;